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-rw-r--r--arch/metag/include/asm/uaccess.h213
1 files changed, 0 insertions, 213 deletions
diff --git a/arch/metag/include/asm/uaccess.h b/arch/metag/include/asm/uaccess.h
deleted file mode 100644
index a5311eb..0000000
--- a/arch/metag/include/asm/uaccess.h
+++ /dev/null
@@ -1,213 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __METAG_UACCESS_H
-#define __METAG_UACCESS_H
-
-/*
- * User space memory access functions
- */
-
-/*
- * The fs value determines whether argument validity checking should be
- * performed or not. If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons, these macros are grossly misnamed.
- */
-
-#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
-
-#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
-#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
-
-#define get_ds() (KERNEL_DS)
-#define get_fs() (current_thread_info()->addr_limit)
-#define set_fs(x) (current_thread_info()->addr_limit = (x))
-
-#define segment_eq(a, b) ((a).seg == (b).seg)
-
-static inline int __access_ok(unsigned long addr, unsigned long size)
-{
- /*
- * Allow access to the user mapped memory area, but not the system area
- * before it. The check extends to the top of the address space when
- * kernel access is allowed (there's no real reason to user copy to the
- * system area in any case).
- */
- if (likely(addr >= META_MEMORY_BASE && addr < get_fs().seg &&
- size <= get_fs().seg - addr))
- return true;
- /*
- * Explicitly allow NULL pointers here. Parts of the kernel such
- * as readv/writev use access_ok to validate pointers, but want
- * to allow NULL pointers for various reasons. NULL pointers are
- * safe to allow through because the first page is not mappable on
- * Meta.
- */
- if (!addr)
- return true;
- /* Allow access to core code memory area... */
- if (addr >= LINCORE_CODE_BASE && addr <= LINCORE_CODE_LIMIT &&
- size <= LINCORE_CODE_LIMIT + 1 - addr)
- return true;
- /* ... but no other areas. */
- return false;
-}
-
-#define access_ok(type, addr, size) __access_ok((unsigned long)(addr), \
- (unsigned long)(size))
-
-#include <asm/extable.h>
-
-/*
- * These are the main single-value transfer routines. They automatically
- * use the right size if we just have the right pointer type.
- */
-
-#define put_user(x, ptr) \
- __put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-#define __put_user(x, ptr) \
- __put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-
-extern void __put_user_bad(void);
-
-#define __put_user_nocheck(x, ptr, size) \
-({ \
- long __pu_err; \
- __put_user_size((x), (ptr), (size), __pu_err); \
- __pu_err; \
-})
-
-#define __put_user_check(x, ptr, size) \
-({ \
- long __pu_err = -EFAULT; \
- __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
- if (access_ok(VERIFY_WRITE, __pu_addr, size)) \
- __put_user_size((x), __pu_addr, (size), __pu_err); \
- __pu_err; \
-})
-
-extern long __put_user_asm_b(unsigned int x, void __user *addr);
-extern long __put_user_asm_w(unsigned int x, void __user *addr);
-extern long __put_user_asm_d(unsigned int x, void __user *addr);
-extern long __put_user_asm_l(unsigned long long x, void __user *addr);
-
-#define __put_user_size(x, ptr, size, retval) \
-do { \
- retval = 0; \
- switch (size) { \
- case 1: \
- retval = __put_user_asm_b((__force unsigned int)x, ptr);\
- break; \
- case 2: \
- retval = __put_user_asm_w((__force unsigned int)x, ptr);\
- break; \
- case 4: \
- retval = __put_user_asm_d((__force unsigned int)x, ptr);\
- break; \
- case 8: \
- retval = __put_user_asm_l((__force unsigned long long)x,\
- ptr); \
- break; \
- default: \
- __put_user_bad(); \
- } \
-} while (0)
-
-#define get_user(x, ptr) \
- __get_user_check((x), (ptr), sizeof(*(ptr)))
-#define __get_user(x, ptr) \
- __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
-
-extern long __get_user_bad(void);
-
-#define __get_user_nocheck(x, ptr, size) \
-({ \
- long __gu_err; \
- long long __gu_val; \
- __get_user_size(__gu_val, (ptr), (size), __gu_err); \
- (x) = (__force __typeof__(*(ptr)))__gu_val; \
- __gu_err; \
-})
-
-#define __get_user_check(x, ptr, size) \
-({ \
- long __gu_err = -EFAULT; \
- long long __gu_val = 0; \
- const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
- if (access_ok(VERIFY_READ, __gu_addr, size)) \
- __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
- (x) = (__force __typeof__(*(ptr)))__gu_val; \
- __gu_err; \
-})
-
-extern unsigned char __get_user_asm_b(const void __user *addr, long *err);
-extern unsigned short __get_user_asm_w(const void __user *addr, long *err);
-extern unsigned int __get_user_asm_d(const void __user *addr, long *err);
-extern unsigned long long __get_user_asm_l(const void __user *addr, long *err);
-
-#define __get_user_size(x, ptr, size, retval) \
-do { \
- retval = 0; \
- switch (size) { \
- case 1: \
- x = __get_user_asm_b(ptr, &retval); break; \
- case 2: \
- x = __get_user_asm_w(ptr, &retval); break; \
- case 4: \
- x = __get_user_asm_d(ptr, &retval); break; \
- case 8: \
- x = __get_user_asm_l(ptr, &retval); break; \
- default: \
- (x) = __get_user_bad(); \
- } \
-} while (0)
-
-/*
- * Copy a null terminated string from userspace.
- *
- * Must return:
- * -EFAULT for an exception
- * count if we hit the buffer limit
- * bytes copied if we hit a null byte
- * (without the null byte)
- */
-
-extern long __must_check __strncpy_from_user(char *dst, const char __user *src,
- long count);
-
-static inline long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- if (!access_ok(VERIFY_READ, src, 1))
- return -EFAULT;
- return __strncpy_from_user(dst, src, count);
-}
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 on exception, a value greater than N if too long
- */
-extern long __must_check strnlen_user(const char __user *src, long count);
-
-extern unsigned long raw_copy_from_user(void *to, const void __user *from,
- unsigned long n);
-extern unsigned long raw_copy_to_user(void __user *to, const void *from,
- unsigned long n);
-
-/*
- * Zero Userspace
- */
-
-extern unsigned long __must_check __do_clear_user(void __user *to,
- unsigned long n);
-
-static inline unsigned long clear_user(void __user *to, unsigned long n)
-{
- if (access_ok(VERIFY_WRITE, to, n))
- return __do_clear_user(to, n);
- return n;
-}
-
-#define __clear_user(to, n) __do_clear_user(to, n)
-
-#endif /* _METAG_UACCESS_H */
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